Sky Optics 400G QSFP112 DR4 single-mode optical transceiver is a medium-short distance high-speed transmission module developed for modern data center spine-leaf network architectures.

Equipped with high-performance 1310nm EML laser transmitter and high-sensitivity PIN&TIA receiver array, this module delivers stable and low-loss 425Gbps ultra-high speed transmission over standard single-mode fiber. It supports a maximum transmission distance of 500 meters, filling the transmission gap between multi-mode short-reach modules and long-reach single-mode modules.
Based on advanced 4×112G PAM4 digital modulation technology, it features strong anti-attenuation capability, ultra-low bit error rate and stable signal transmission.
With a power consumption of less than 9W and wide temperature working range of 15°C to 70°C, it can adapt to complex and changeable data center operating environments. Fully compliant with IEEE 802.3ck and CMIS 4.0 specifications and equipped with DDM intelligent monitoring function, the module supports real-time operation data statistics and remote fault diagnosis.

It is widely used for medium-short distance interconnection of switches in computer rooms, cross-area link deployment of campus data centers, and high-speed networking of cloud computing platforms.